J.C. Penney stock jumps following influential tweet

(Reuters) - Shares of J.C. Penney Co Inc (JCP.N) jumped almost 10 percent briefly on Wednesday after a well-known fashion editor sent a glowing message about the department store's revamp under chief executive Ron Johnson on social networking website Twitter.

"I'm @jcpenney's HQ. Thank you Ron Johson (sic) for the walk through of JCP's prototype. Get ready to shop! Its (sic) going to be a game changer!" Nina Garcia, Marie Claire magazine fashion editor and judge on television show "Project Runway", said in a tweet.

Garcia also signed on last week as J.C. Penney's "Style Voice" and fashion collection curator.

Penney shares rose to as much as $23.09. The stock was up 4.9 percent at $22.02 later on Wednesday afternoon on the New York Stock Exchange.